Idle-Up Vacuum Switching Valve (IVSV) (PRIZM)
- IVSV is located on end of intake manifold on Prizm except LSi or below mass airflow sensor on Prizm LSi. IVSV by-passes air into intake manifold on Prizm except LSi or around throttle valve of mass airflow sensor on Prizm LSi when it is activated by ECM.
- IVSV is energized whenever idle speed drops to less than desired RPM due to engine load (i.e., electrical, P/S, A/T in Drive, etc.). Other information is not available from manufacturer.